In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 742 ( 2017-7), p. 223-230
Abstract:
Conventional WC-Co hardmetals are widely used in various applications due to their excellent properties. High hardness can be achieved using compositions with little to no content of cobalt or nickel. These binder metals are hazardous to health, making a substitution not only desirable because of availability and cost reasons. A new possibility to manufacture such hard materials is the combination of tungsten carbide with oxides such as Al 2 O 3 and ZrO 2 . In this way the binder metal content can be replaced. Furthermore the content of the also expensive WC can be reduced. Such metal carbide – oxide composites with oxide contents between 16 vol% and 40 vol% were manufactured. The completely dense composites feature high hardness values of 2000 HV10 to 2400 HV10 while also having an acceptable fracture toughness of up to 7 MPa⋅m 1/2 . The improved mechanical properties make the replacement of WC-Co hardmetals and binder free WC ceramics in special areas possible.
Type of Medium:
Online Resource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.742
DOI:
10.4028/www.scientific.net/KEM.742.223
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2017
detail.hit.zdb_id:
2073306-9
